If i have to execute an external program (for example, in the frontend that i created for convert, from ImageMagick) i have 2 possibilities: i can call one function between the exec* family, or i can call the system function: so, which in your opinion is the best? The only difference that i know (but i may be in error) between these 2 functions is that the former doesn't return (so you have to create a child process), but the latter returns. Is this the only difference?
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